989

Experimental evidence of sixfold oxygen coordination for phosphorus
Fabrice Brunet, Anne-Marie Flank, Jean-Paul Itié, Tetsuo Irifune, and Pierre Lagarde

1080

TEM investigation of Ca-rich plagioclase: Structural fluctuations related to the I1–P1 phase transition
Péter Németh, Mario Tribaudino, Emiliano Bruno, and Peter R. Buseck

1133

Crystal chemistry of synthetic Ca₂Al₃Si₃O₁₂OH–Sr₂Al₃Si₃O₁₂OH solid-solution series of zoisite and clinozoisite
G. Dörsam, A. Liebscher, B. Wunder, G. Franz, and M. Gottschalk

1190

The high-pressure structural configurations of Ca_0.2Sr_0.8Al₂Si₂O₈ feldspar: The I1–I2/c and I2/c–P2₁/c phase transitions
Piera Benna, Fabrizio Nestola, Tiziana Boffa Ballaran, Tonči Balić-Žunić, Lars Fahl Lundegaard, and Emiliano Bruno

1213

Brittle fracturing and fracture healing of zircon: An integrated cathodoluminescence, EBSD, U-Th-Pb, and REE study
A. Rimša, M.J. Whitehouse, L. Johansson, and S. Piazolo

1225

Galaxite, MnAl₂O₄, a spectroscopic standard for tetrahedrally coordinated Mn²⁺ in oxygen-based mineral structures
Ulf Hålenius, Ferdinando Bosi, and Henrik Skogby

1232

Magmatic paragonite in trondhjemites from the Sierra del Convento mélange, Cuba
Antonio García-Casco

1238

Valence state partitioning of Cr and V between pyroxene-melt: Estimates of oxygen fugacity for martian basalt QUE 94201
J.M. Karner, J.J. Papike, C.K. Shearer, G. Mckay, L. Le, and P. Burger

1242

Crystal-structure refinement of Na-bearing clinopyroxenes from mantle-derived eclogite xenoliths
Fabrizio Nestola, Micaela Longo, Catherine McCammon, and Tiziana Boffa Ballaran

1246

High-pressure transition of CaCO₃
Shigeaki Ono, Takumi Kikegawa, and Yasuo Ohishi

994

Dehydration of Ca-montmorillonite at the crystal scale. Part I: Structure evolution
Eric Ferrage, Caroline A. Kirk, Gordon Cressey, and Javier Cuadros

1007

Dehydration of Ca-montmorillonite at the crystal scale. Part 2. Mechanisms and kinetics
Eric Ferrage, Caroline A. Kirk, Gordon Cressey, and Javier Cuadros

1018

The high-pressure crystal structure of potassium hydrogen carbonate (KHCO₃)
D.R. Allan, W.G. Marshall, and C.R. Pulham

1026

Effect of Al³⁺ and H⁺ on the elastic properties of stishovite
Dmitry L. Lakshtanov, Konstantin D. Litasov, Stanislav V. Sinogeikin, Holger Hellwig, Jie Li, Eiji Ohtani, and Jay D. Bass

1031

Investigation of synthetic Mg_1.3V_1.7O₄ spinel with MgO inclusions: Case study of a spinel with an apparently occupied interstitial site
Hinako Uchida, Kevin Righter, Barbara Lavina, Matthew M. Nowell, Stuart I. Wright, Robert T. Downs, and Hexiong Yang

1038

Thermal expansion of deuterated hopeite, Zn₃(PO₄)₂·4D₂O
Paul F. Schofield, Kevin S. Knight, Mark E. Hodson, and Anna M. Lanfranco

1048

Compression, thermal expansion, structure, and instability of CaIrO₃, the structure model of MgSiO₃ post-perovskite
C. David Martin, Karena W. Chapman, Peter J. Chupas, Vitali Prakapenka, Peter L. Lee, Sarvjit D. Shastri, and John B. Parise

1054

Crystal chemical relationships in the tourmaline group: Structural constraints on chemical variability
Ferdinando Bosi and Sergio Lucchesi

1064

The energetics of hematite dissolution in iron-oxide-rich melts: In situ high-temperature calorimetric studies
Riham M. Morcos, Benjamin G. Ellis, and Alexandra Navrotsky

1071

A simple model of oscillatory zoning in magmatic plagioclase: Development of an isothermal undercooling model
Akira Tsune and Atsushi Toramaru

1087

Crystal-chemistry of Ni in marine ferromanganese crusts and nodules
Caroline L. Peacock and David M. Sherman

1093

Effect of structural transitions on properties of high-pressure silicate melts: ²⁷Al NMR, glass densities, and melt viscosities
Jeffrey R. Allwardt, Jonathan F. Stebbins, Hidenori Terasaki, Lin-Shu Du, Daniel J. Frost, Anthony C. Withers, Marc M. Hirschmann, Akio Suzuki, and Eiji Ohtani

1105

Material conversion from paper-sludge ash in NaOH, KOH, and LiOH solutions
Takaaki Wajima, Hiroji Ishimoto, Keiko Kuzawa, Kazuhiko Ito, Osamu Tamada, Mickey E. Gunter, and John F. Rakovan

1112

High-pressure phase relations and crystal chemistry of calcium ferrite-type solid solutions in the system MgAl₂O₄-Mg₂SiO₄
Hiroshi Kojitani, Ryosuke Hisatomi, and Masaki Akaogi

1119

Origin of atoll garnets in eclogites and implications for the redistribution of trace elements during slab exhumation in a continental subduction zone
Hao Cheng, Eizo Nakamura, Katsura Kobayashi, and Zuyi Zhou

1130

Determination of the refractive index of particles in the clay and sub-micrometer size range
Peter G. Weidler and Frank Friedrich

1148

Thermal infrared spectroscopy and modeling of experimentally shocked basalts
Jeffrey R. Johnson, Matthew I. Staid, and Michael D. Kraft

1158

P-V and T-V Equations of State of natural biotite: An in-situ high-pressure and high-temperature powder diffraction study, combined with M??ssbauer spectroscopy
A. Pavese, N. Curetti, V. Diella, D. Levy, M. Dapiaggi, and U. Russo

1165

Cation ordering in MgTi₂O₅ (karrooite): Probing temperature dependent effects with neutrons
Alistair R. Lennie, Kevin S. Knight, and C. Michael B. Henderson

1181

An order-disorder model for omphacitic pyroxenes in the system jadeite-diopside-hedenbergite-acmite, with applications to eclogitic rocks
Eleanor Green, Tim Holland, and Roger Powell

1200

Mechanisms of diamond oxidation and their bearing on the fluid composition in kimberlite magmas
Yana Fedortchouk, Dante Canil, and Elena Semenets

1250

BOOK REVIEW: THE SMALE COLLECTION: BEAUTY IN NATURAL CRYSTALS by Steve Smale (editors: G. Staebler and G. Neumeier), Lithographie. LLC, East Hampton, Conneticut (2006) 203 pages, hardcover,
Florie Caporuscio

1251

BOOK REVIEW: CHASING THE GLITTER: BLACK HILLS MILLING, 1874-1959, by Richard L. Clow. South Dakota State Historical Society Press, Pierre, South Dakota, 2002, 202 p.
John F. Childs